Thanks in advance for the thoughts. Currently I have a RadGrid with a fair amount of comboboxes. In order to ensure that the comboboxes have been populated prior to drawing the grid, I have opted to create the columns programmatically after a chain of DDS HasLoaded events. When they iterate to 9, I call a programmatic build of the Grid. For lack of a better phrase, is there a better approach to incorporate a more robust XAML / MVVM approach? Thanks for the insight.